Adaptive Compensation Loop Control Method for Dynamic Range Wireless Power Transfer in Endoscopic Capsules Applications

作者：Zhang, Hao^*; Zhong, Zheng; Wu, Wen

来源：Applied Computational Electromagnetics Society Journal, 2018, 33(5): 499-504.

• Adaptive compensation loop
• dynamic range
• enhanced nMOSFET
• MPPC
• resistor feedback network
• WEC
• WPT

In this paper, an adaptive compensation loop control method is presented for dynamic range wireless power transfer (WPT) based wireless endoscopic capsules (WEC) applications. Rather than a fixed external resistor feedback network utilized in the DC-DC converter with maximum power point control (MPPC) capability, an enhanced nMOSFET based adaptive compensation loop is introduced to extract maximum power transfer from the RF-DC rectifier within overall operational power range of the WEC system. Simulation in ADS and measurement among three rectifiers with an LDO, a fixed external resistor feedback network and an adaptive compensation loop control are performed respectively to achieve a steady 3.3V on a resistive load of 100 Omega, which validates that the proposed adaptive compensation loop control method realizes an extended dynamic power range with a lower limit of 21.5dBm to realize a minimum 100mW load DC power delivery for the IPT enabled WEC system.

• 出版日期2018-5
• 单位南京理工大学